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Calculation of optical constants in a-Ge10Se90-xTex (x = 0, 30, 40) thin films

P. SHARMA1,* , S. C. KATYAL1

Affiliation

  1. Department of Physics, Jaypee University of Information Technology, Waknaghat, Solan, H.P. 173215, India

Abstract

Thin films of a-Ge10Se90-xTex (x = 0, 30, 40) glassy alloys are prepared by vacuum evaporation technique at ~10-5 Torr on cleaned glass substrate at room temperature. Optical study is performed to calculate the refractive index (n), extinction coefficient (k), optical conductivity (σ), dielectric constant (real and imaginary), absorption coefficient (α) and optical band gap ( opt g E ) using transmission spectra in the wavelength range 400-1400 nm..

Keywords

Chalcogenide glasses, Optical properties, Optical band gap, Defect states, Average bond energy.

Submitted at: Sept. 25, 2006
Accepted at: July 15, 2007

Citation

P. SHARMA, S. C. KATYAL, Calculation of optical constants in a-Ge10Se90-xTex (x = 0, 30, 40) thin films, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2000-2004 (2007)